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-rw-r--r--memrchr.c43
1 files changed, 43 insertions, 0 deletions
diff --git a/memrchr.c b/memrchr.c
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--- /dev/null
+++ b/memrchr.c
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+/*
+ * This file is part of libESMTP, a library for submission of RFC 2822
+ * formatted electronic mail messages using the SMTP protocol described
+ * in RFC 2821.
+ *
+ * Copyright (C) 2004 Brian Stafford <brian@stafford.uklinux.net>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+#undef HAVE_MEMRCHR
+#undef _GNU_SOURCE
+#undef _ISOC9X_SOURCE
+#undef _OSF_SOURCE
+#undef _XOPEN_SOURCE
+#undef __EXTENSIONS__
+#include <missing.h>
+
+void *
+memrchr (const void *a, int c, size_t len)
+{
+ const unsigned char *p = a;
+
+ for (p += len - 1; (const void *) p >= a; p--)
+ if (*p == c)
+ return (void *) p;
+ return (void *) 0;
+}